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Sub: Biology SA2 Revision
Fill in the blanks1. Dengue and chikungunya are caused by ________________ mosquito.
2. Substances administered to the body to prevent diseases is called _______________
3. Chickenpox spreads through _______________
4. Pneumonia is caused by bacteria _______________
5. In asthmatic attacks, inflammation is reduced using ________________
6. __________________ respiration helps to obtain oxygen for respiration.
7. Haemoglobin is________________found in the blood.
8. The right side of the heart has______________ blood.
9. Veins have________________ walls than arteries.
10.Once the right atrium is filled with _______________ blood, it contracts.
11.Diseases that spread from one person to other person is known as _____________________.
12.The upper two chambers of heart are called _________________
13.Massaging gums and teeth after brushing _______________ the circulation of blood.
14.________________is responsible for keeping villages clean.
15.In human beings, breathing out is also called __________________
16.The large muscular sheet that forms the base of the ribcage is _______________
17.The ________________ produces bile that helps in digestion.
18.The ________________ are tiny hair-like structures that filter dust in the nasal passage.
19.Blood flows away from the heart through _________________________ and return to the heart through
__________________________.
20.________________________ is a condition caused by the lack of proper nutrients in the diet.
21.The __________________ filters waste materials from the blood.
22.The undigested food is stored and released from the body through the ____________.
23.______________is the final product of carbohydrates digestion and broken down by Oxygen to release
energy.
24.Each alveolus is surrounded by tiny blood vessels called _______________________.
25.Haemoglobin binds with oxygen and forms a compound called ____________________.
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